Base for jacks



A. E. HUTCHISON AND H. KRAH.

BASE FOR JACKS.

APPLICATION FILED 1AN.22. |920.

1 350, 970. Patented Aug. 24, 1920.

WI TIVESSES INVENTOR 5 A TTOHNEYS oarreo STATES.

PATENT OFFICE.

ARTHUR EDWARDS HUTCHISON AND Hearty KRAH, on NEW YORK, n. Y.

lBASE FOR JACKS.

asaaaao.

Specification of Letters Patent.

Patented Aug. 24, 1929..

Application filed January 22, 1920. Serial No. 353.259.

To all whom it may concern:

Be it known that we, ARTHUR E. HUTOHI- SON and HARRY KRAH, both citizensof the United States, and residents of the city of New York, borough ofBrooklyn, in the county of Kings and State of New York, have invented anew andlmproved Base for Jacks, of which the following is a full, clear,and exact description.

The present invention relates to new and useful improvements in jacks,and it pertains more particularly to lifting jacks especially employedas an accessory of motor vehicles. In jacks of this type difliculty hasbeen experienced in maintaining the jacks in true vertical alinementduring the lifting operation.

It is one of the objects of the present invention to provide meanswhereby the lifting operation is carried out with greater facility thanwith jacks as at present constructed.

The invention consists of a rigid base adapted to be removably securedto a jack of ordinary construction when the same is in operation, saidbase being capable of removal therefrom when the jack in not inoperation.

The invention further consists in so constructing the securing means forthe jack that the latter may be adjusted with respect to the base.

With the above and other objects in view reference is had to theaccompanying drawings in which Figure 1 is a perspective view showingthe jack in place upon the base;

Fig. 2 is an inverted plan View of the base,

\ and Fig. 3 is a detail sectional View. Referring more particularly tothe drawings, the device comprises a base 5, which is preferablyrectangular in form. This base is the base and merging into said point7, is a reinforcing rib 9. Between the ends of each of the reinforcingribs 8 and 9, said ribs are provided with suitable bolt-head-receivingrecesses 10, and said recesses are formed by terminating the ribs as at11, and forming a continuous wall 12 of substantially oval shape.

The base is provided in each of the boltreceiving recesses 10, with aslot 13, which passes entirely through said base, and said slots havestraight side walls 14, the purpose of which will be hereinafterdescribed.

The reference character 15 designates bolts, and one of these bolts isadapted to be passed through each of the slots 13 from the rear face ofthe base 5, the heads of these bolts lying within the bolt-receivingrecesses 10, as designated in Fig. 2. These bolts 15 are provided neartheir heads with square portions 17, and these square portions 17 areadapted to engage the straight side walls 14 of the slots 13 to preventa rotating movement of the bolts within the slots.

The free threaded end of each of the bolts 15 is adapted topass througha lug or dog 19, and these lugs or dogs 19 are movable with respect tothe top face of the base 5 for a purpose to be hereinafter described.The lower face of each of these dogs 19 is serrated as at 20, and theseserrations 20 are adapted to interengage with the serrated surfaces 21on the base 5 adjacent the bolt openings or slots 13. Threaded upon thefree end of each of the bolts 15 and adapted to form the means fortightening the dogs or lugs 19 in position, is a nut 22, and interposedbetween each of the nuts and the top face of each of the dogs 19, is awasher 23.

The device operates in the following manner:

The reference character 30 designates a jack of the ordinary type, and31 indicates the base thereof. This base 31 is adapted to be receivedupon the base 5, and after it has been thus positioned, the nuts 22 areloosened to permit of a movement of the dogs or lugs 19, so that theircut-out portions 25 will overlie the base 31 of the jack 30. WVhen theselugs have been thus positioned, the nuts 22 are tightened to draw theserrated faces 20 and 21 of the dogs 19 and the base 5, respectively,into engagement with each other to secure the dogs against accidentaldisplacement.

By this construction it will be seen that a flat support for the jack 30is formed by the base 5, and that, at the same time, said base isremovable from the jack in order that-the parts may occupy comparativelylittle space when not in use.

plurality of elongated openings, a plurality of serrations surroundingeach of the openings on the top face of the base, a lug having aplurality of serrations adapted for interengagement with the serrationssurrounding the openings in the base, bolts having I 10 squaredportions, the square portion of said bolts being adapted to be receivedwithin the elongated openings in such a manner as .to prevent turning ofthe bolts, said bolts passing through the lugs, and nuts adapted forengagement with the bolts whereby the lugs are adjustable relative tothe base for rigidly securing a jack in position on the top face of saidbase.

v ARTHUR EDWARDS HUTOHISON.

mum! KRAH. I

